METHOD OF PREPARING TRIOXEPANE COMPOSITION USE THEREOF IN CROSSLINKING POLYMERS Russian patent published in 2010 - IPC C07D323/00 C08J3/24 C08K5/159 C08F10/06 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of preparing a trioxepane compound of formula (I) comprising less than 3.5 wt % of dialkyl peroxide based on the total amount of peroxides, the said process comprising steps of reacting a glycol compound of formula R³CHOH-CH₂-C(CH₃)₂OH with hydrogen peroxide in the presence of an acid to form a glycol hydroperoxide, purifying the glycol hydroperoxide, reacting the purified glycol hydroperoxide with a ketone or aldehyde of formula R¹R²CO in the presence of an acid to form the trioxepane compound, and purifying the trioxepane compound, wherein R¹, R² and R³ are independently selected from hydrogen and (C₁-C₂₀)-alkyl, (C₃-C₂₀)-cycloalkyl, (C₆-C₂₀)-aryl, (C₇-C₂₀)-aralkyl and (C₇-C₂₀)-alkaryl, where the said groups may include straight or branched alkyl groups, while two groups from R^1-3 may bond to form a cycloalkyl ring; where optionally one or more substitutes for each R^1-3 are selected from a group consisting of hydroxy, alkoxy, straight or branched alk(en)yl, aryloxy, halogen, carboxylic acid, ester, carboxy, nitrile and amido with the proviso that if R¹ and R² are both methyl groups, R³ is not hydrogen.

EFFECT: initiator compositions containing the so-prepared trioxepane compound are characterised by a high safe processing temperature combined with good crosslink efficiency.

10 cl, 29 ex